yes, this is the main drawback of Esenthel for me. maybe c++ programmers like it.
as a consequence: I'm upgrading my 3DGS from extra to commercial in this month

and another important thing: Esenthel does not have at the moment instancing and no shader supported bone animation, what you can get by buying 3DGS Pro (only sprite instancing, as I read model instancing was implemented and tested but won't be released because the complexity and low performance boost).